Templet



Dec. 3, 1946.

S. W. HAYES TEMPLET Original F iled March 20, 1940 Patented Dec. 3, 1946 Stanley W. Hayes, Richmond, Ind., asslgnor to Hayes Track Appliance Company, Richmond, Ind., a corporation of Indiana Application August 26, 1942, Serial No. 456,144, which is a division of application Serial No. 325,084, March 20, 1940, now Patent No.

2,317,526, dated April 27, 1943.

Divided and this application October 25, 1943, Serial No.

3 Claims.

The present invention relates to templets and particularly templets of the character adapted to be used in conjunction with metal cutting means so mounted that the cutting means duplicates the movement of tracing means, such as a tracing wheel. This application is a division of my copending application Serial No. 456,144, filed August 26, 1942, which is in turn a division of my application Serial No. 325,084, filed March 20, 1940, which issued as Patent No. 2,317,526 on April 27, 1943,

The primary object of the present invention is the provision of a new and improved templet.

A further object of the present invention is the provision of a new and improved templet so constructed that a tracing wheel may be moved thereabout readily and accurately.

Another object of the present invention is the provision of a templet of the character described so constructed that the tracing wheel may be moved on the outside of all the curves of the templet and so that changes in direction of movement of the tracing wheel may be made both quickly and accurately.

Further objects and advantages of the invention will become apparent from the ensuing description, in the course of which reference is had to the accompanying drawing, in which Fig. 1 is a plan View of a structural element;

Fig, 2 is a fragmentary plan View illustrating a templet made in accordance with the present invention for cutting out the structuralelement illustrated in Fig. 1;

Fig. 3 is a fragmentary cross-sectional view taken along the line 3-3 of Fig. 2;

Fig, 4 i a plan View of another structural element; and

Fig. 5 is a fragmentary plan view of a templet made in accordance with the present invention for cutting out the structural element of Fig. 4.

Templets made in accordance with the present invention are particularly adapted for use with apparatus such as torch cutting apparatus having a tracing wheel through which the torch is guid- .ed, the tracing wheel and torch both being mounted on a pantograph assembly. The tracing wheel may be made to follow a templet manually or through a power drive, but the templets of the present invention are particularly adapted for use when the tracing wheel is guided manually.

Metal templets are preferredfor production purposes. They have the advantages of long life,

and speed and require less skill in an operator.

Metal templets that may be made readily and economically and which possess the advantages that the tracing wheel always moves on the outside of all curves and enables the operator to make accurate turns at just the right time and very quickly are shown in Figs. 2 and 5. These templets are provided for cuttin out the structural element illustrated in Figs. 1 and 4, respectively.

Referring first to Figs. 1, 2, and 3, Fig. 1 discloses a structural element It) and Fig.2 a templet for cutting out the structural element. The base 12 of the templet, only a fragment of which is shown, and the-parts of the templet proper referred to hereinafter are preferably made of sheet metal of a thickness of about l4gauge. The templet is so constructed that the tracing wheel moves on the outside of all curves and guides are provided for both the front and rear of the wheel at each angle to assist the operator in making turns, At the instant of the turn the front of thewheel bears on one piece of the templet and the rear comes around against a supplementary piece assisting the operator to make the turn quickly and just at the right time.

The templet comprises a substantially U -shaped piece 14 punched at three places as indicated by the reference characters I6 to enable it securely to be welded to the base plate. Co-operating with this piece is a second piece l8 generally rectangular in shape and. punched at four places, as indicated by the reference characters 20, to provide places for Welding it to the base plate. Associated with the lower extremities of the U-shaped portion I4 are a pair of supplementary guide pieces 22 and 24, functioning to assist the oper-.

ator in making turns quickly and at the right time.

If careful attention is given to Fig. 2, it may be noted that certain of the lines depicting the templet are drawn smoothly and the others more or less roughly. The purpose of this is to indicate those portions of the templet which should be dimensioned exactly in order to produce a structural element corresponding to that desired and also to indicate portions that need not be dimensioned exactly. The smooth lines indicate the 5 distance suflicient to provide a lane for and to engage the other side of the wheel as the direction of movement of the wheel is changed.

3. A templet adapted to be used with a tracing Wheel of a metal working apparatus to efiect movement of a part of the apparatus along a path requiring a change in direction of movement, as from a generally clockwise to a generally counter-clockwise direction, and requiring relatively sharp turns to be made including in combination, a base, wheel guiding structure having portions extending upwardly from the base, said portions being configured to correspond to the desired movement of the said part of the apparatus and having vertical wheel guiding surfaces so located that one side of the wheel may be brought against certain surfaces corresponding to a generally clockwise movement of the wheel and the other side of the wheel may be brought against other surfaces corresponding to a generally counter-clockwise movement of the wheel, whereby said tracing wheel may be made always to follow the outsides of surfaces, and structure providing supplementary. vertical guiding surfaces to assist an operator in changing the direction of movement of and making sharp turns with the tracin wheel, said surfaces being parallel to but displaced from adjacent first mentioned surfaces a distance sufficient to provide a lane for and to engage the other side of the wheel as the direction of movement of the wheel is changed and as the wheel is brought around a turn.

STANLEY W. HAYES. 

